Patent Number: 8,872,494

Title: Semiconductor integrated circuit device, DC-DC converter, and voltage conversion method

Abstract: A semiconductor integrated circuit device is employed in a DC-DC converter that switches the voltage fed to the load depending on the PWM signal. The semiconductor integrated circuit device has an error voltage generating part, a mode setting part, an oscillation signal generating part, a pulse generating part, and a control part. The oscillation signal generating part generates an oscillation signal with a prescribed period when in the non-light-load mode, and it turns off the oscillation signal when in the light-load mode. The pulse generating part generates a pulse signal before the oscillation signal generating part generates the oscillation signal when the pulse generating part switches from the light-load to the non-light-load mode.

Inventors: Hirakawa; Takuya (Kanagawa-ken, JP)

Assignee: Kabushiki Kaisha Toshiba

International Classification: G05F 1/00 (20060101)

Expiration Date: 2018-10-28 0:00:00